Samsung SGH-D415 / SGH-D410

Unlocked, and receiving ATT signal

The dealer unlocked my phone for me, and now I can use the T-mobile selfishly exclusive D415 phone w/ my ATT plan. My question is, would I be excluded from Att/Cingular services because its not a ATT/Cingular phone?

I'm trying to get tones onto my phone and I've tried the free sites, nothing (because no internet access because of unlocked phone??). and I tried to use the infrared (IrDA) with my computer. I can receive phonebook information onto my computer, but as far as sending information to the cellphone itself via IrDA, it fails to work. Anyone have any solution..

1)unlocked, does it exclude me from cingular services?2)Infrared not accepting files but does send them. How do I make it...(continues)

Well, the guy at the cellphone place did it for me, so I'm not sure. I can text message okay, but as far as browse the internet, send pictures or media, I can't. I still get the T-Zone when I press that button. I suppose it's suppose to say M-life or whatever.